|
|
Post by chouman on Dec 9, 2019 15:48:06 GMT
Now the psu. In the photo you can see two linear psu, each one with a 22000uf cap and a schottky diode bridge. One psu has a 12V superreg from Sparkos, excellent, for the dac. The other reg is from Dexa, new version, 8V, for the Matrix.
Cables are solid silver, and silver contacts. Toroid from Toroidy. 200VA, 2x18 volts. It gives 24/25V to the input of the regs. I tryed a 30W talema, but 200W worked much better. More punch, but not agressive. More presence.
The regs are not hot. Not even warm.
This kind of psu gives me much better results than a Salas psu, for example, and many others that are supposed to be better. For me, you can't compare, point. Better than this will be the Dorado, I guees. Superregs. I'll see.   |
|
|
|
Post by chouman on Dec 9, 2019 16:06:32 GMT
All this is connected to a Nutube buffer with gain and a classA amplifier, the diy USSA2 from FAB. This is a classA with punch, 25Watts. It is not conceived to sleep, it's very sharp, punchy and delicate. I can hear a sweet violin or Joe Satriani, very loud. I was a "fanatic" Naim guy many years before, so beleive me.
Lets not forget the cables. They all are copper foil, even in digital. For me they are outstanding. The best I've heard, and I have heard a lot. Speakers are Vecteur Premier, vintage, modded.
I will try to make a litle review about the sound of this dac with the psu and Matrix interface, later, in this thread. I am not a technician and I am not a writer, so please have that in mind, but I have my ears and a lot of hifi background. I mean , I heard tones of hifi systems of all kinds in the last 30 years. I have plans for other speakers, but his dac is here to stay.
I will make another thread about my system and some personal "secrets" like how to make a high end cable that could cost 5000 euros...with a few euros. My next project is a speaker with the Eikona2 drivers in a stone enclosure. I will post it here in this forum. So far, thanks for seeing my threat and please comment!!
Once again, thank you for all the help and A special thanks to Stanley for answering to my emails and sometimes my stupid questions.
Francisco
|
|
|
|
Post by MikeMusic on Dec 9, 2019 16:13:59 GMT
Very well done Francisco
Superb job and superb results.
This is miles out of my comfort and competence zone
|
|
|
|
Post by chouman on Dec 9, 2019 16:19:30 GMT
Very well done Francisco Superb job and superb results. This is miles out of my comfort and competence zone I just do imitation. After imitating a thousand times I begin to understand a litle bit of what I am doing. Then, sometimes the copy is better than the original. |
|
|
|
Post by MikeMusic on Dec 9, 2019 16:24:02 GMT
Very well done Francisco Superb job and superb results. This is miles out of my comfort and competence zone I just do imitation. After imitating a thousand times I begin to understand a litle bit of what I am doing. Then, sometimes the copy is better than the original. That we have in common Give me a blank piece of paper and I am stuck Give me something *that I understand* and I will make it better Would take me a very long time to come up to speed on the internals of a SEG. Might never make it |
|
|
|
Post by chouman on Dec 9, 2019 17:04:26 GMT
All the IEC cables are OTA from 47 Laboratory, 4 cables in parallel in a simple schuko plug. I can't live without them. There are two OTA models. The best one, by far, in ths thinnest. There are lots of better cables, but those I tried are not.
The internal cables for the rca sockets are solid silver, 24 AWG. This matters.
I also changed the inductors. I am not sure if better inductors here make better sound. I know that better inductors in classD amps are a good thing.
The signal resistors in the headamp are from Amtrans. Here, the signal caps must be changed, but I am not sure about the right value, yet. Does anybody knows it? 220nf? The op amp is from Sparkos. I did not hear this headamp, yet. I am not a headphone guy. I may buy a nice pair of "ear speakers" one of these days.
|
|
|
|
Post by MikeMusic on Dec 9, 2019 17:14:02 GMT
Technical stuff well above this simple punter's head.
Schuko I agree with as you then don't need fuses in the UK.
Is 4 in parallel legal ?
|
|
|
|
Post by chouman on Dec 9, 2019 17:16:45 GMT
Technical stuff well above this simple punter's head. Schuko I agree with as you then don't need fuses in the UK. Is 4 in parallel legal ? I don't know if it is legal... may be not!
The OTA is not supposed to be used in mains. But it works very well.
|
|
|
|
Post by MikeMusic on Dec 9, 2019 17:18:52 GMT
Technical stuff well above this simple punter's head. Schuko I agree with as you then don't need fuses in the UK. Is 4 in parallel legal ? I don't know if it is legal... may be not! The OTA is not supposed to be used in mains. But it works very well.
That's a step too far for cautious little me Take care and turn it all off when you go out ! |
|
|
|
Post by chouman on Dec 9, 2019 17:21:44 GMT
Don't worry. I use them since more than 15 years, with all my stuff.
|
|
|
|
Post by John on Dec 9, 2019 17:47:31 GMT
Nice job I always enjoy reading people's projects
Please share your DIY hacks
|
|
|
|
Post by MartinT on Dec 9, 2019 17:48:53 GMT
Good work, Francisco. I found Dexa regs to be excellent.
|
|
atoz
Rank: Trio
Posts: 147
|
Post by atoz on Dec 10, 2019 13:12:34 GMT
Thanks for the pics Francisco.
Always good to see what other peoples approach is to upgrades of same components..maybe the same changes but different manufacturers capacitors and clocks etc
|
|
|
|
Post by chouman on Dec 10, 2019 14:16:17 GMT
You're wellcome! It was fun!
|
|
|
|
Post by MartinT on Dec 10, 2019 14:21:29 GMT
Happy Birthday, Francisco!
|
|
|
|
Post by chouman on Dec 10, 2019 14:27:10 GMT
Thank you Martin!
|
|
|
|
Post by chouman on Dec 10, 2019 14:27:44 GMT
Thank you TAS!
|
|
|
|
Post by julesd68 on Dec 10, 2019 14:36:55 GMT
I will make another thread about my system and some personal "secrets" like how to make a high end cable that could cost 5000 euros...with a few euros. I am looking forward to this one Francisco! Enjoy your birthday.  |
|
|
|
Post by MikeMusic on Dec 10, 2019 16:04:02 GMT
Have a great birthday Francisco
|
|
|
|
Post by chouman on Dec 10, 2019 16:36:02 GMT
Thank you Jules and Mike!
|
|
